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During the refactoring I had passed loop_vinfo on to vect_set_loop_condition during prolog peeling. This parameter is unused in most cases except for in vect_set_loop_condition_partial_vectors where it's behaviour depends on whether loop_vinfo is NULL or not. Apparently this code expect it to be NULL and it reads the structures from a different location. This fixes the failing testcase which was not using the lens values determined earlier in vectorizable_store because it was looking it up in the given loop_vinfo instead. gcc/ChangeLog: PR tree-optimization/111866 * tree-vect-loop-manip.cc (vect_do_peeling): Pass null as vinfo to vect_set_loop_condition during prolog peeling.
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